Question | Answer |
What are the subparts of the microanatomy of the Small Intestine? | 1. Plicae Circularis; 2. Villi; 3. Intestinal Glands; 4. Goblet Cells; 5. Tunica |
What are the Plicae Circularis? | Circular Folds - increase surface area |
What are Villi? | VASCULAR projections from the Tunica Mucosa - improve absorption |
What is the function of Intestinal Glands? | secrete Digestive Enzymes |
What is the function of Goblet Cells within the Small Intestine? | secrete Mucus to PROTECT Epithelial Cells |
What are the layers of the Tunica of the Small Intestine from the inside --> outside? | 1. Tunica Mucosa; 2. Tunica Submucosa; 3. Tunica Muscularis; 4. Tunica Serous |
What are the layers of the Tunica Mucosa of the Small Intestine? | 1. Simple Columnar Epithelium; 2. Lamina Propria; 3. Muscularis Mucosa |
What is Lamina Propria and where is it found? | the underlying Connective Tissue with Blood Capillaries and Lacteals - 2nd layer of Tunica Mucosa |
What is the composition of the Muscularis Mucosa and where is it located? | Smooth Muscle - 3rd layer of the Tunica Mucosa |
What is the 1st layer of the Tunica Mucosa? | Simple Columnar Epithelium |
What is the histology of the Tunica Mucosa? | Mucous Membrane |
What is the histology of the Tunica Submucosa? | Areolar Tissue |
What is the Tunica Submucosa? | longitudinal group of Vessels, Nerves Lymphatics |
What is the histology of the Tunica Muscularis? | Smooth Muscle |
What are the sub-layers of the Tunica Muscularis? | 1. Circular Layer (slinky); 2. Longitudinal Layer (straight) |
What is the function of the Tunica Muscularis? | contributes to GI Peristalsis - shortening & squeezing motion |
What is the histology of the Tunica Serous? | Simple Squamous Epithelium & Connective Tissue |
What is the function of the Tunica Serous? | OUTERMOST - Supportive layer - AKA Visceral Peritoneum |